1. Causes of indigestion in pregnant women. Due to changes in hormonal levels during pregnancy, many changes occur within the body of pregnant women. These changes may lead to indigestion. In addition, the gastrointestinal tract of pregnant women will also be affected by compression and fetal growth, resulting in indigestion. 2. Symptoms of indigestion in pregnant women Symptoms of indigestion in pregnant women include nausea, vomiting, gas, diarrhea and constipation. These symptoms can